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Couplings of hybrid operators to ground and excited states of bottomonia | | Tommy Burch
; Christian Ehmann
; | | Date: |
29 Dec 2006 | | Abstract: | We analyze the overlap of color-octet meson operators with the $Upsilon$ and the $eta_b$ and their excited states, especially the first radial excitations. Our analysis is based on NRQCD and includes all terms up to order $v^4$. We use a variety of source and sink operators as a basis for the variational method, which enables us to clearly separate the mass eigenstates and hence to extract the desired amplitudes. The results show the usefulness of the variational method for determining couplings to excited hadronic states. | | Source: | arXiv, hep-lat/0701001 | | Services: | Forum | Review | PDF | Favorites | |
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